The Unofficial Aftermarket Air Suspension Thread

[askiles]

Car looks great, I just saw a few people between here and Reddit having issues with the front struts leaking from the top and then just playing the waiting game with air demand to send them repair kits or replacements, not something I want to deal with on my daily driver.

Anybody have any input in regards to the 12v accessory wiring with the new lithium ion battery setup?

I had read some of that as well, but have not experienced that myself. Fingers crossed.

I got 12v constant power from the penthouse under the rear seat. That would be the same for the new or old 12v batteries. I got my switched 12v source from the trailer brake connector in the driver's side kick panel.

 

[miss demeanor]

I had read some of that as well, but have not experienced that myself. Fingers crossed.

I got 12v constant power from the penthouse under the rear seat. That would be the same for the new or old 12v batteries. I got my switched 12v source from the trailer brake connector in the driver's side kick panel.

Is there a video guide on where that might be on a model 3 or does anyone know? Is it in the same location? Or is there a way to just have a hard switch that you flip to turn it off to avoid having to find somewhere with turn on ignition?

Thanks!

 

[askiles]

Is there a video guide on where that might be on a model 3 or does anyone know? Is it in the same location? Or is there a way to just have a hard switch that you flip to turn it off to avoid having to find somewhere with turn on ignition?

Thanks!

If you are going to use a switch, you could use the same source that you use for constant power. I don't know where the trailer braker plug is on a M3, if they even have one?!?

 

[Voltron_M3]

Is there a video guide on where that might be on a model 3 or does anyone know? Is it in the same location? Or is there a way to just have a hard switch that you flip to turn it off to avoid having to find somewhere with turn on ignition?

Thanks!

Here is my "kill switch" that draws power from the 12v accessory in the center console

 

[miss demeanor]

If you are going to use a switch, you could use the same source that you use for constant power. I don't know where the trailer braker plug is on a M3, if they even have one?!?

Any downsides to using a kill switch from the constant power source? Other than adding another point of failure in the switch.

 

[miss demeanor]

Here is my "kill switch" that draws power from the 12v accessory in the center console

View attachment 864904

Looks good! Do you still have your little door panel thing there? Or did you lose that for the integrated setup.

 

[MUNSTERWRENCH]

Mine are still trouble free

 

[eglove]

Is there a video guide on where that might be on a model 3 or does anyone know? Is it in the same location? Or is there a way to just have a hard switch that you flip to turn it off to avoid having to find somewhere with turn on ignition?

Thanks!

 

[miss demeanor]

Can you wire to the 12V battery in the frunk and then just use a toggle / kill switch so it turns off the compressor but not the rest of the features of the car?

 

[eglove]

Can you wire to the 12V battery in the frunk and then just use a toggle / kill switch so it turns off the compressor but not the rest of the features of the car?

I wouldn't bother doing that - if you follow the instructions in peekay's video which has been posted multiple times, the car is inert when your door is closed. light brown wire for 12v switched under drivers kick or in the center console where you would put an OBD2 adapter and light blue 12v constant wire

 

[askiles]

Can you wire to the 12V battery in the frunk and then just use a toggle / kill switch so it turns off the compressor but not the rest of the features of the car?

Yes, you could do that if you wanted. You will just have to remember to manually turn it on and off as necessary. I would put a relay on that switch too.

 

[miss demeanor]

Yes, you could do that if you wanted. You will just have to remember to manually turn it on and off as necessary. I would put a relay on that switch too.

What's the point of the relay?

 

[miss demeanor]

Bag install all done!

 

[askiles]

What's the point of the relay?

It's always good to put a relay on a switch.

 

[askiles]

Bag install all done!


View attachment 868895

Looks great! Where did you end up mounting the management/compressor(s)?

 

[miss demeanor]

Looks great! Where did you end up mounting the management/compressor(s)?

Thanks, in the frunk! I am having a weird issue though, where when I air out, the PSI drops to 0 even though my preset is set to 55/66, and then it airs back up to 70 on all 4 corners and doesn't use my preset settings. Not sure what's causing that.

 

[rafelos1337]

I have had air suspension for a while now and I went through a 12v battery but it was overdue to be changed out. It lasted about 3 years. After I got the new battery I got some 12v low messages that went away. Recently my car went into limp mode with a BMS_a170 and BMS_a027. When I dropped off the car I was talking to the tech and he said there were many 12v low faults. They are charging a diagnostic fee since I have the air hooked up to the battery. TLDR has anyone seen issues with low voltage and air suspension? My auto on is hooked up to the cigarette plug in the center console and 3p screen goes off when the car sleeps. I wondering if the air setup is causing the issues here. I think my issue is stemming from the fact that the constant power for the air is connected directly to the 12v battery and it needs to be moved to under the rear seat and connected to the DC-DC converter. The power draw from the compressors coming on is probably kicking faults. Possibly I would also move my accessory power to the passenger kick panel or the OBD port under the rear vents. What are you guys thoughts as I am new to air and don't know a lot about this. Thanks.

 

[eglove]

Yea I would definitely move it to switched source inside the car, there's a thick blue wire in the centre console that you can splice into for constant 12v and a thin brown wire you can use for switched

 

[ACupOfAvgJoe]

question for the folks running UAS bags, what pressure is your ride height? I seem to be sitting around 130 front and 70 rear to get around a 27in FTG measurement all around.
I feel this is a bit high psi wise, I see some people saying 70psi is their front bagride height but I need at least 70psi in the front bags to start lifting the car off the ground!
My previous cars had a 50-70psi ride height, but were double bellow bags instead of the sleeve design UAS has.
I know I can adjust the collars to raise it but I feel I have it at the perfect setting so it lays the battery when slammed. curious what everyone else is driving at.

 

[TwoK4drSi]

question for the folks running UAS bags, what pressure is your ride height? I seem to be sitting around 130 front and 70 rear to get around a 27in FTG measurement all around.
I feel this is a bit high psi wise, I see some people saying 70psi is their front bagride height but I need at least 70psi in the front bags to start lifting the car off the ground!
My previous cars had a 50-70psi ride height, but were double bellow bags instead of the sleeve design UAS has.
I know I can adjust the collars to raise it but I feel I have it at the perfect setting so it lays the battery when slammed. curious what everyone else is driving at.

Don’t compare any other brand to UAS. UAS needs a lot of air. 120/70 ish is ride height for me at ~28”